Introduction to SQLite

Database Introduction: SQLite is an embedded relational Database management system (DBMS). It does not need an independent server process to work, but calls directly from the application program, and manages the database by reading and writing files directly. SQLite is a lightweight database system with a library file size of only a few hundred KB, which can be used across platforms. Date of establishment and founder or company: SQLite by D Richard Hipp was founded in 2000. SQLite was created by Hipp itself and published under the authorization of Public Domain. Applicable scenario: SQLite is suitable for small applications on embedded systems and mobile devices. It has a small storage volume and memory footprint, and does not require an independent database server, making it very suitable for resource limited environments. SQLite is suitable for applications that require quick operation and management of small databases. Advantages: 1. Compact and Convenient: SQLite provides a compact library file that can be easily embedded into applications without the need for an independent database server. 2. Zero configuration: SQLite does not require any configuration or management, just needs to import the database file and operate the database file. 3. Powerful Query language: SQLite supports standard SQL syntax and can perform complex queries and data operations. 4. Support transactions: SQLite supports Transaction processing to ensure data consistency and reliability. 5. Cross platform: SQLite can be used on multiple operating systems, including Windows, Mac, Linux, and more. Disadvantages: 1. Not suitable for high concurrency: Due to SQLite being an embedded database that directly interacts with applications and does not support multiple processes accessing the database simultaneously, it is not suitable for high concurrency scenarios. 2. Network not supported: SQLite does not have an independent database server and cannot access the database through network connections, limiting its application scope. 3. Database performance is not as good as large databases: Compared to large database systems such as MySQL, Oracle, etc., SQLite's performance may be limited in some cases. Technical principles: SQLite uses a B-tree data structure to organize data and store it in one or more files. Each file has a B-tree root node, which recursively traverses the root node and other B-tree nodes to query data. SQLite uses the SQL language for data operations, supporting basic data types and relational operations. Performance analysis: SQLite performs well in most small application scenarios, and its response speed is very fast for scenarios with small amounts of data and single user access. However, in situations of large-scale data and high concurrency access, SQLite's performance may be inferior to some large database systems. Official website: The official website of SQLite is: https://www.sqlite.org/ Summary: SQLite is a compact, simple and zero configuration embedded relational Database management system. It is suitable for embedded systems and small applications on mobile devices, and has strong Query language and transaction support. However, SQLite is not suitable for high concurrency and large-scale data scenarios, and lacks network connectivity capabilities. Anyway, for some lightweight applications and resource limited environments, SQLite is a reliable choice.